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Dr. Andrew Rynne
MD
Dr. Andrew Rynne

Family Physician

Exp 50 years

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What Causes Positive THC Even After Discontinuation Of Marijuana Usage?

I have hypothyroid and have not smoked marijuana since June 1st and my levels have been dropping each month (june- 290 parts/m, july- 89 parts/m), but I don t understand why I am still testing positive for THC. Could this have something to do with my hypothyroid?
Mon, 27 Feb 2017
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Addiction Medicine Specialist,  's  Response
Yes. It lowers overall metabolic rate. The burning up / metabolism of drugs is a metabolically dependent process. It hasn't been looked at AND it certainly will lower metabolism/clearing of THC. One reason it cannot be looked at is it is well known that FAT sucks up oily things like THC. To test the effect of thyroid metabolism you'd have to get THIN hypothyroid people who smoke a lot of THC and not treat them for a month. Not Gonna Happen.

More bad news, the tail is not linear. So, it does NOT go 300, 200, 100, 0. It is not proportional, so it does not go 300, 150, 75, 37.5. It gets progressively lower falling rate for the last little bit. The THC levels often go 300, 150, 100, 50, 125, 40, 78, 25, 42. It will be months.
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What Causes Positive THC Even After Discontinuation Of Marijuana Usage?

Yes. It lowers overall metabolic rate. The burning up / metabolism of drugs is a metabolically dependent process. It hasn t been looked at AND it certainly will lower metabolism/clearing of THC. One reason it cannot be looked at is it is well known that FAT sucks up oily things like THC. To test the effect of thyroid metabolism you d have to get THIN hypothyroid people who smoke a lot of THC and not treat them for a month. Not Gonna Happen. More bad news, the tail is not linear. So, it does NOT go 300, 200, 100, 0. It is not proportional, so it does not go 300, 150, 75, 37.5. It gets progressively lower falling rate for the last little bit. The THC levels often go 300, 150, 100, 50, 125, 40, 78, 25, 42. It will be months.